Printable Hard Sudoku

Set 2m2gtb. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
2 6
1 3 5 8
8 9 2 4
9 5
9 1 2 7
8 7 4 1
4 5 1 3
8 4 1 9 5
Hard #2
8 6 3
3 5 1 7
6 2 5 4
5 9 1 3
1 6 4
4
6 2
7 9 5 8
8 3 2 5
Hard #3
8 1 7
1 6 8
3 2
5 4 9 6
7 2 5
3
2 7 1 8 3 6
1 4 7
6 3 5 1
Hard #4
3 9
6 2
8 2 7 4
7 3
3 8 2 6
6 3 1 9 7
9 4 7 8
6 1 2 4
8 4
Hard #5
7 8 1 3
6 1 3 8
8 7
7 8 4 9 5
3
2 5 3
1 5 3 6
6 5 8
4 8 5
Hard #6
7 9 3
8 2
1 3 6 5
2 1
3 4 7 2
1 8 7
3 1 6
6 5 7 3 1
9 6 5
Hard #7
1 2 5 4
4 3 6
7 5 1
1 2 7
7 1 3 5
6 2 5
8
3 4
2 8 7 4 9 1
Hard #8
8 2 3
2
5 1 9 7 6
3 5 7 4
3 7
1 9 6
6 5 2 7
5 8
4 2 1 6 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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